Condenser



Feb. 23 1926. 1;574,424

H. A. HATCH CONDENSER Filed Oct. 16, 1920 'l/V VEN TOR mw ffl/322@ A TTOH/VEY mittd to cool off at atmospheric temperature.

Thel elements as thus constructed are measured as to capacity and stocked in appropriate bins.

When' condensers of a definite capacity are desired, the properelements are selected and an identifying plate 4 of ibre or other suitable material is placed on the element. This plate is provided with apertures 5 for a purpose to be hereinafter described. Underneath the elements are placed a suitable number of mica plates 6, 7, so that the overall thickness of the condenser will be thatsuitable to the Width of the terminal clamps soon to be described. It is of course 'understood that the plate 4 may also be varied in thickness and that if desired the width of the clam may be varied at will. 4These sheets 6, are made slightly wider than the elements 2 so that when the clamps are applied, they will be parallel to one another and perpendicular to the Ifilms. The clamps vare each made up of sheet metal into an open sided boxlike structure protecting the lateral edges and corners of the element.

denser is effected.

The sheet from which the clamp is formed comprises a main body portion '9 having lateral ears 10, 10 on one side and ears 11,. 11 on the other side, an additional terminal member 12 being also struck out on the same rside as the ears 11, 11. Another pair of end ears 13, 13 are also provided,

. The clamp" is wrapped laround the condenser element as is clearly indicated in Figures 2, 3 and 4, the ears 10 being bent into the apertures 5 of the fibre sheet so as to retain the clamps in place. v

The tinfoil ends 14 of the element are folded back upon the fibre retaining plate of the element and suilicient pressure is applied to the clamps as they are positioned on the element to mechanically securely hold them in place and t'o -make good electrical Contact with the tinfoil sheets without the use of solder.

The element being already a compacted mass, the pressure of the clamps on the element does not alter the distances between the dielectrics and sowhile the terminal clamps of the element are rigidly held in place no change in the capacity of the con- In Figure A6, I have shown but one ear 10* instead of two and the form of terminal member -12 is slightly dilerent.

-It is of course apparent that condensers of suitable capacity may be made by combining several elements or by splittingFone urthermore by using a vsheet 401 different thickness a single clamp 8 may serve for condenser elements ofvconsiderable yrange in thickness. The built' up condenser, according tomy invention, has the capacity aycredited to it by the identifying slip of paper inserted between 'the la t two layers of mica. The connecting of the terminal vclamps to the tinfoil without the use of solder, renders the condenser longer lived due to the absence of the soldering flux which because of the acid which is always present therein destroysfthe tinfoil in time. The

'element is. protected from,destruction by body ortio n.

condenser comprising a compacted, compiledcondenser element having'a definite electrical capacity including means comprising at least one' plate of stili' insulating material having apertures therethrough and twopmetallic clamps on opposite sides of the element, said clamps Having at least one ear intermediate its ends for entering said apertures to hold the clamps and plate in mechanical interlocking engagement and -effect electrical contact of the clamps with the conducting elements of the condenser, said clamps being pressed onto said element substantially with a pressure sufficient to make the electrical contact and to retain the capacity of the condenser.

3. A condenser comprisingy alternate layers of mica and metal foil extending beyond the mica on two sides, a cover plate of insulating material having lon two opposite sides at least one aperture intermediate the other sides, clamping members in electrical engagement with the metal foil embracing the layers of mica and'foil and each having at least one ear spaced intermediate its ends andC bent into said aperture for the purposes described. t

A4. A condenser comprising alternate layers of mica and metal foil vextending beyond l the mica on two sides, clampingniembers in electrical engagement with the metal :foil i embracing the layers of mica and foil and means for. preventing both said clamping members from being moved in any direction, comprising a plate of stili insulating material having recesses spaced a substantial distance from two opposite edges and away from thel other two edges and at least one ear on each of said clamping members intermediate its ends, said ear or ears being adapted to be forced into said recesses substantially as described;

5. en electrical.. Widmer Comprising vf opposite ends of the condenser stack and of substantially the same width as the condenser, with their opposite edges on the opposite faces of said plate separated by a desired space, whereby said clamping mem'- bers can exert a uniform. ressure upon substantially the entire sur ace of said plate and therethrough over substantially the en tire area of the conducting and insulating sheets and securing means attached to each of the clamping members to hold them in all directions in firm engagement with said plate, said clamping members being connected with conducting sheets of opposite polarities in said stack. I

6. An electrical condenser comprising a stack of sheets of conducting and dielectric. material, means for holding the stack to-` gether after it has been formed to give the desired capacity, including at least one plate of stiftl insulating material and a pair of metallic terminal clamps extending over and pressed onto the said stack over said plate,

said conducting sheets of opposite polarity being brought`out at different sides of the stack and bent over so vas to be engaged by vsaid terminal clamps, said insulating plate havingmeans to receive gripping devices and gripping devices on the terminal clamps flrced under pressure into said insulating plate receiving means, to hold the clamping terminals from movement in any direction and to assist in drawing the terminal clamps onto the stack.

7. A condenser vcomprising a stack of dielectric and metallic sheets arranged in groups having prolecting ends of opposite polarity, at least one bearing lmember of still' insulating material overlying a face of the stack, terminal clamping members of relatively stiff metallic material extending around and;- reachino' over the op site ends or sides ofthe stac sand of su stantially the same width as the condenser and engaging said group ends and securing means cooperating between at least one bearin member and the-'clamping members where y the terminal clamps are drawninto secu-re and firm engagement with the said group ends j and bearing member on the stack.

8. A condensercomprising a .stack of dielectric and metallic sheets,arranged in groups having projecting endsv of opposite r of Apolarity, at least one bearing mem stiff insulating material overlying a face of the stack, terminal clamping members of relatively stiff" metallic material extending around the opposite ends or sides of the as to secure pressure on the group ends and bearingV member by the clamps-for substantially their full length..

9. An electrical condenser comprising a stack of suitably insulated conductive sheets extendingalternately at opposite ends of the stack, bearing members of relatively stiff insulating material overlying opposite faces of the stack, clamps embracing and extending over the opposite ends of said sheets and bearing members and clamping same together and in electrical contact with sheets of opposite polarity, at least one of said bearing members having at least one opening therethrough nextending on op osite sides of a median line between the c am s and substantially parallel to the ends of t e stack, and a securing device positioned in each of said openings and coacting with its associated clamp and the bearing member for holding said clamps in said clamping position.

10. A condenser comprising a stack of conducting layers separated by insulation,

a plate at each side ot the condenser, part of said layers being electrically connected to one of said side plates and the remaining layers to the other side plate, each side plate having its opposite edges bent over'so that at least one cover platel for said stack, and

at least one edge engages the outer face of said cover plate, said edge having securin means for engaging sai cover plate an assisting in securin said edge against same without projecting beyond the inner face of the cover plate into sald stack.

11. In a condenserA comprising a stack of conducting layers separated by insulation, at least one relatively rigid insulatin cover plate for said stack, and a deformabe conducting plate at each side of the condenser, part of said layers being electrically connected to Yone of-said side plates, and the remaining layers to the other side plate, each side plate having its opposite edges bent over so that at least one edge engages the outer face of said cover plate, sald edge having securing means and said cover plate having openings to receive saidmeans to assist in holding said edge against said cover plate, said means being too short to 'project from the inner-faces of said cover plate into said stack.

`In testimony whereof, I allix my signature. 

